The randomised, double-blind, crossover research, printed within the journal Vitamins, assessed the impact of supplementing with 5 mg/kg physique weight caffeine over one week of coaching.
The authors from Spain discovered that the influence of caffeine consumption improved the well-being, bodily efficiency and notion of fatigue within the girls’s volleyball crew athletes.
Feminine-focused analysis wanted
Caffeine is usually utilized in athletic efficiency as an ergogenic assist, with its recognition on the rise because of its impact on cardio and anaerobic actions, rising energy and energy capability by enhancing intracellular calcium and Na+-Okay+ ATPase pump exercise and delaying the onset of fatigue by means of activation of the central nervous system, which blocks the adenosine receptors.
It has been effectively established {that a} vary of supplementation with a dose of three to 9 mg/kg physique weight enhances athletic efficiency. And caffeine consumption one hour earlier than a coaching session has been proven to be an optimum technique to boost efficiency because of its quick absorption and plasma availability.
The authors famous that whereas earlier volleyball research have reported the impact of caffeine on leaping enchancment, parts equivalent to agility and alter of path stay unclear and that extra proof is required to find out the impact of caffeine on agility, particularly in girls’s volleyball.
“Caffeine has been confirmed to ship constructive outcomes in lowering perceived exertion and diminishing muscular soreness or injury, though to a lesser diploma than in males,” they wrote. “And, a major undesirable facet to think about concerning caffeine supplementation in athletes is that it may negatively have an effect on sleep high quality, particularly in girls athletes as a result of the impact of caffeine persists longer in girls than in males.
“The scientific literature on the ergogenic impact of caffeine on girls’s volleyball gamers is scarce or missing, which highlights the significance of this matter in volleyball. Therefore, you will need to know its results on bodily efficiency, fatigue, and wellness.”
The ‘tremendous league’ research
The researchers recruited a pattern of eight semi-professional girls’s volleyball gamers from the “Spanish Girls’s Superleague 2” between the ages of 17 and 25 years and assigned them to both a caffeine or placebo supplementation group. The caffeine group consumed 5 mg/kg of caffeine anhydrous powder based mostly on physique weight earlier than acute coaching. Members switched teams after a one-week washout interval.
In each teams, contributors carried out countermovement jumps, repeated jumps and handgrip checks, and alter of path was assessed. Properly-being was additionally evaluated by wellness questionnaire.
Outcomes from ANOVA checks revealed a major impact of supplementation (F (1.7) = 8.41, p = 0.02, η2 = 0.54) throughout the coaching week on bodily efficiency. The researchers additionally reported a big impact of caffeine supplementation on perceived muscle injury and fatigue (F (1.7) = 7.29, p = 0.03, and η2 = 0.51), in addition to higher handgrip leads to the caffeine group as in comparison with placebo however solely within the dominant hand.
“Additional related analysis is required in girls that collects each bodily efficiency and well-being parameters and correlates these variables, notably in extremely aggressive intervals such because the playoffs,” the researchers concluded.
Supply: Vitamins
doi: doi.org/10.3390/nu16010029
“The Impact of Caffeine Supplementation on Feminine Volleyball Gamers’ Efficiency and Wellness throughout a Common Coaching Week”
Authors: Jesús Siquier-Coll et al.
